Seung Chang, M.D.
Family Medicine Physician · Walnut, CA
Seung Chang, M.D. is a family medicine physician with a practice address in Walnut, California, and NPI 1073603460, issued on Oct 13, 2006. Check the license (California A350670, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Seung Chang
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A350670 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19687 Valley Blvd, Walnut, CA 91789
- Phone
- (909) 598-5228
- Enumerated
- Oct 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (909) 598-9021
- Medicare enrollment
- Enrolled (PECOS I20101115000580); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Seung Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A350670Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
12 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- American Current Care OF California A Medical CorporationCity Of Industry, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Seung Chang among 17,133 family medicine physician records in California
Seung Chang, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1973 · median 2005 among the 10,652 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Walnut → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jane Kong, M.D.Diamond Bar, CA 917891912910357
- Fe Advincula, M.D.West Covina, CA 917901235162272
- Melody Angeles-Riparip, M.D.West Covina, CA 917901093752248
- Van Duong, M.D.West Covina, CA 917901497705289
- John Koumas, D.O.West Covina, CA 917901134111958
- Zaida Obeso, M.D.West Covina, CA 917901881790616
- Jose Pilpa, MDWest Covina, CA 917901760439012
- Elise Pomerance, M.D.West Covina, CA 917901568569606
Common questions
What is Seung Chang, M.D.'s NPI number?
Seung Chang, M.D.'s National Provider Identifier (NPI) is 1073603460, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Seung Chang, M.D. located?
The NPPES record lists a practice address at 19687 Valley Blvd, Walnut, CA, 91789. Phone: (909) 598-5228. Providers update this record themselves, so call before visiting.
How can I verify Seung Chang, M.D.'s license?
NPPES lists California license number A350670, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Seung Chang, M.D. prescribe under Medicare Part D?
In 2024, Seung Chang, M.D. had 12 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.